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                                <h1 id="&#x7B2C;-1-&#x7AE0;-ha-&#x6982;&#x8FF0;">&#x7B2C; 1 &#x7AE0; <code>HA</code> &#x6982;&#x8FF0;</h1>
<p>&#x672C;&#x7AE0;&#x4ECB;&#x7ECD;&#x4EC0;&#x4E48;&#x662F;<code>HA</code>, &#x4EE5;&#x53CA;&#x4E3A;&#x4EC0;&#x4E48;&#x9700;&#x8981;<code>HA</code>.</p>
<p>&#x6240;&#x8C13;<code>HA</code>&#x5C31;&#x662F;<code>High Available</code>, &#x5373; <my>&#x9AD8;&#x53EF;&#x7528;</my>, &#x53EF;&#x7528;&#x505A;&#x5230;&#x4E0D;&#x95F4;&#x65AD; <code>7 * 24</code>&#x5C0F;&#x65F6;&#x63D0;&#x4F9B;&#x670D;&#x52A1;.</p>
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<h2 id="11-&#x4E3A;&#x4EC0;&#x4E48;&#x9700;&#x8981;ha">1.1 &#x4E3A;&#x4EC0;&#x4E48;&#x9700;&#x8981;HA</h2>
<p>&#x5728; <code>Hadoop 1.0</code> &#x65F6;&#x4EE3;&#xFF0C;Hadoop &#x7684;&#x4E24;&#x5927;&#x6838;&#x5FC3;&#x7EC4;&#x4EF6; <code>HDFS NameNode</code> &#x548C; <code>JobTracker</code> &#x90FD;&#x5B58;&#x5728;&#x7740;&#x5355;&#x70B9;&#x95EE;&#x9898;&#xFF0C;&#x8FD9;&#x5176;&#x4E2D;&#x4EE5; <code>NameNode</code> &#x7684;&#x5355;&#x70B9;&#x95EE;&#x9898;&#x5C24;&#x4E3A;&#x4E25;&#x91CD;&#x3002;</p>
<p>&#x56E0;&#x4E3A; <code>NameNode</code> &#x4FDD;&#x5B58;&#x4E86;&#x6574;&#x4E2A; <code>HDFS</code> &#x7684;&#x5143;&#x6570;&#x636E;&#x4FE1;&#x606F;&#xFF0C;&#x4E00;&#x65E6; <code>NameNode</code> &#x6302;&#x6389;&#xFF0C;&#x6574;&#x4E2A; <code>HDFS</code> &#x5C31;&#x65E0;&#x6CD5;&#x8BBF;&#x95EE;.</p>
<p>&#x6240;&#x5E78;&#x7684;&#x662F;&#xFF0C;&#x5728; <code>Hadoop2.0</code> &#x4E2D;&#xFF0C;<code>HDFS NameNode</code> &#x548C; <code>YARN ResourceManger</code>&#x7684;&#x5355;&#x70B9;&#x95EE;&#x9898;&#x90FD;&#x5F97;&#x5230;&#x4E86;&#x89E3;&#x51B3;.</p>
<p>&#x50CF; <code>NameNode</code> &#x548C; <code>ResouceManager</code> &#x5728;&#x5206;&#x5E03;&#x5F0F;&#x7CFB;&#x7EDF;&#x4E2D;&#x53EA;&#x6709;&#x4E00;&#x4E2A;&#x8FD0;&#x884C;&#x5B9E;&#x4F8B;, &#x6700;&#x5927;&#x7684;&#x9690;&#x60A3;&#x5C31;&#x662F;&#x5355;&#x70B9;&#x6545;&#x969C;&#x95EE;&#x9898;.</p>
<p><code>Hadoop2.0+</code> &#x5B9E;&#x73B0;&#x9AD8;&#x53EF;&#x7528;&#x6700;&#x5173;&#x952E;&#x7684;&#x7B56;&#x7565;&#x662F;<my>&#x6D88;&#x9664;&#x5355;&#x70B9;&#x6545;&#x969C;</my>.</p>
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<h2 id="12-hadoop-&#x9AD8;&#x53EF;&#x7528;&#x5206;&#x7C7B;">1.2 Hadoop &#x9AD8;&#x53EF;&#x7528;&#x5206;&#x7C7B;</h2>
<p>&#x7531;&#x4E8E;<code>HDFS NameNode</code> &#x548C; <code>Yarn ResourceManage</code> &#x90FD;&#x5B58;&#x5728;&#x5355;&#x70B9;&#x5931;&#x6548;&#x6545;&#x969C;&#x7684;&#x98CE;&#x9669;, </p>
<p>&#x6240;&#x4EE5;<code>Hadoop</code>&#x6709;&#x4E24;&#x79CD;<code>HA</code>:</p>
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<li><p><code>HDFS HA</code></p>
<p>&#x89E3;&#x51B3;<code>NameNode</code>&#x7684;&#x5355;&#x70B9;&#x6545;&#x969C;&#x95EE;&#x9898;</p>
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<li><p><code>ResourceManage HA</code></p>
<p>&#x89E3;&#x51B3;<code>ResourceMange</code>&#x7684;&#x5355;&#x70B9;&#x6545;&#x969C;&#x95EE;&#x9898; </p>
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